Fluorochemicals from fluorspar via a phosphate-enabled mechanochemical process that bypasses HF.
Science
; 381(6655): 302-306, 2023 Jul 21.
Article
en En
| MEDLINE
| ID: mdl-37471551
ABSTRACT
All fluorochemicals-including elemental fluorine and nucleophilic, electrophilic, and radical fluorinating reagents-are prepared from hydrogen fluoride (HF). This highly toxic and corrosive gas is produced by the reaction of acid-grade fluorspar (>97% CaF2) with sulfuric acid under harsh conditions. The use of fluorspar to produce fluorochemicals via a process that bypasses HF is highly desirable but remains an unsolved problem because of the prohibitive insolubility of CaF2. Inspired by calcium phosphate biomineralization, we herein disclose a protocol of treating acid-grade fluorspar with dipotassium hydrogen phosphate (K2HPO4) under mechanochemical conditions. The process affords a solid composed of crystalline K3(HPO4)F and K2-xCay(PO3F)a(PO4)b, which is found suitable for forging sulfur-fluorine and carbon-fluorine bonds.
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MEDLINE
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En
Revista:
Science
Año:
2023
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Article
País de afiliación:
Reino Unido